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Studies on the susceptibility of Shanghai mosquitoes to experimental infection with Wuchereria bancrofti Cobbold. I: Aedes albopictus Skuse. II: Armigeres obturbans Walker. Ill: Culex tritaeniorhynchus Giles. IV: Aedes vexans var. nipponii Theobald



Studies on the susceptibility of Shanghai mosquitoes to experimental infection with Wuchereria bancrofti Cobbold. I: Aedes albopictus Skuse. II: Armigeres obturbans Walker. Ill: Culex tritaeniorhynchus Giles. IV: Aedes vexans var. nipponii Theobald



Peking Nat Hist Bull 9-10(4-1-2): 249-254, 255-260, 39-43, 127-131



I: Of 62 A. albopictus which were infected experimentally on a heavy W. bancrofti case, 48 harbored dead immatured forms of the filariae. Of microfilariae which succeeded in penetrating through the stomach wall only dead remains were found in the thorax and abdomen of the mosquitoes when they were dissected over 10 days after the time of infection. Chitinous encapsulation of the immatured filariae occurred in 4 cases.[long dash]II: Of 102 Armigeres obturbans infected experimentally, 81 contained the filariae when they were dissected; 11 contained chitinized larvae of the sausage stage, the remaining 70 only dead microfilarial forms. The filarial larvae were found to be able to develop completely to the infective stage in some Culex pipiens, which were infected at the same time. Dissections of 383 A. obturbans collected during Sept.-Oct., 1933, from 199 houses in Woosung area, were negative for W. bancrofti larvae, although the C. pipiens from some of these houses were positive.[long dash]III: Of 73 Culex tritaeniorhynchus fed on a light case of W. bancrofti, showing an av. count of 7.8 microfilariae per 20 c.mm. of blood, only 8 were found harboring the filarial larvae when dissected 11-21 days after the infection, and in only one case had the filarial larvae reached the infective stage. Of 181 of these mosquitoes infected on a heavy case, 97 harbored filarial larvae after more than 10 days of incubation. However, in only 4 of these 97 mosquitoes were the larvae able to complete their development to the infective stage. This mosquito has not been found infected in nature in the Shanghai region.[long dash]IV: Of 195 Aedes vexana v. nipponii which had fed on a heavily infected case, 140 were found containing dead immature forms of the parasite. The filariae were not able to undergo any development after having penetrated into the body cavity of the host. They were of a microfilarial form and had all undergone chitinous encapsulation.

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Studies on the Susceptibility of Shanghai Mosquitoes to Experimental Infection with Wuchereria bancrofti Cobbold. IV. Aedes vexans var. nipponii Theobald. Peking nat. Hist. Bull, Peiping, 10: pt. 2, 127-131, 1935

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